Pay telephone station



April 14, 1936. COLLINS ET AL 2,031 57 PAY TELEPHONE STATION OriginalFiled Nov. 30, 1931 6 Sheets-Sheet 1 April 14, 1936. R. D. COLLINS ET ALPAY TELEPHONE STATION Original Filed Nov. 30, 1951 s Sheets-Sheet 2 R.D. COLLINS ET AL 2,037,157

PAY TELEPHONE STATION Original Fi1ed Nov. 30, 1931 6Sheets-Sheet 5IIlIIII ll.

M 1936. R. D. COLLINS ET AL PAY TELEPHONE STATION 6 Sheets-Sheet 4Original Filed NOV. 30, 1931 Arifl 14, 1936. R D LUN ETAL 2,03%157 PAYTELEPHONE STATION Original Filed Nov} 30, 1.931 6 Sheets-Sheet 5 Aprifl14, 1936.' R, co L s AL 2937,15?

PAY TELEPHONE STATION Originai FiledNov. 50, 1951 6 Sheets-Sheet 6Patented Apr. 14, 1936 PATENT FFICE PAY TELEPHONE STATION Ralph D.Collins, Los

Angeles, and Sylvain F.

Crane, Long Beach, Calif., assignors to Associated Telephone UtilitiesCompany, Chicago,

111., a. corporation of Delaware Original application November 30, 1931,Serial Divided and this application August 18, 1934, Serial No. 740,466

8 Claims.

Our invention relates to pay telephone stations and has particularreference to a pay telephone station adapted for the automaticstation-selecting telephones. In connection with pay station telephones,several problems are presented in connection with the automaticstation-selecting telephones which are not presented in the systemsusing manual station-selecting systems, in which a telephone exchangeoperator selects the called station and has control over the callingpending upon whether or not the call is completed.

For example, the dial selecting or automatic station-selecting phonesmust be rendered operative by the initial coin to permit the dialing orselecting of the desired called station, and must be adapted to returnthe coin in the event that the station called is busy or fails toanswer, while, at the same time, the station must be adapted to collectthe coin in the event of completion of the call.

On the other hand, such stations must be adapted to permit conversationupon an incoming call, that is, when another station on the system iscalling the pay station. Thus, the telephone station must be adapted toreceive incoming calls without the necessity of depositing a. cointherein, while it must be adapted to prevent outgoing calls without thedeposit of the coin.

Automatic station selective systems adapted to accomplish the resultsset forth in the preceding paragraph, have been devised; for example,systerns such as are shown and described in our copending applicationsSerial Numbers 512,620 and 554,190.

This application is a division of our copending application Serial No.578,060, filed November 30, 1931.

However, in the present system, it is frequently possible for thecalling party to strike a sharp blow on the housing of the telephonestation and thereby release the coin to permit it to be refunded, eventhough the called station has bee-n effectively connected.

It is an object of our invention to provide a pay telephone station inwhich the outgoing calls may be accomplished only upon the deposit of acoin, but which will permit incoming calls to be effectively connectedwithout the necessity of depositing a coin, and which cannot be actuatedby a blow on the housing to refund a coin if the connections areeffectively made to talk to a called station.

Another object of our invention is to provide station to either collector refund the coin, clea pay telephone station which is provided withlocking means, preventing conversing and/or dialing, in the case ofoutgoing calls, but which will permit conversing in the event of anincoming call, by means of a device which operates only responsive tothe combined ringing of the station and the act or acts of answering thering.

Another object of our invention is to provide a pay telephone station inwhich outgoing calls may be effectively made upon the deposit of aminimum charge denomination coin, but which also may be made by thedeposit of other coins of greater denomination.

Another object of the invention is to provide a pay telephone station inwhich communication with a long distance exchange, information, or othertelephone system service or business ofiice, may be accomplished by thedeposit of any one of a number of different denomination coins; thusmaking it unnecessary for the calling party to have the exact minimumcharge denomination coin in order to put through calls of thischaracter.

Another object of the invention is to provide means for holding suchinitially deposited coins in abeyance in the station, ready to'berefunded upon the completion of such nonchargeable calls.

Another object of our invention is to provide a pay telephone station inwhich spurious coins, either undersized or underweight coins, will besegregated from correct weight or size coins, and which will preventeffective operation of the station by such spurious coins.

Other objects of our invention will be apparent from a study of thefollowing specifications, read in connection with the accompanyingdrawings, wherein Fig. 1 is a front elevational view of a pay telephonestation constructed in accordance with our invention;

Fig. 2 is a front elevational view of a telephone station illustrated inFig. 1, showing the cover open and exposing the coin collecting andrefunding apparatus;

Fig. 3 is a vertical sectional view taken along the line III-III of Fig.1, illustrating the coin collecting and refunding apparatus associatedwiththe talking and listening and dialing apparatus;

Fig. 4 is a detail rear elevational view of the coin collecting andrefunding apparatus shown in Fig. 2;

Fig. 5 is a detail side elevational View of a portion of the coincollecting apparatus illustrating the operation of portions of thedevice by the receiver hook;

Fig. 6 is a fragmentary elevational view of a portion of the coincollecting and refunding devices, illustrating the basket trippingapparatus and the coin holding and releasing device;

Fig. '7 is a detail horizontal sectional View taken along line VII-VII,Fig. 2, showing the magnet and coin collection device in assembledrelation;

Fig. 8 is a detail sectional view taken along line VIII-VIII of Fig. 6,illustrating the basket tripping device;

Fig. 9 is a fragmentary sectional view taken along line IXIX of Fig. '7;

Fig. 10 is a fragmentary sectional view taken along line X-X of Fig. 3;and

Fig. 11 is a diagrammatic view showing the wiring employed in connectingour pay telephone station to the supply lines from a central station.

Referring to the drawings, we have illustrated in Fig. 1 a pay telephonestation comprising a box-like housing I having side walls 2 and 3, a topwall 4, a bottom wall 5, and having a cover 6 hingedly secured to theside wall 3, as by means of a hinge I. A look 8 is preferably providedfor maintaining the cover in closed position when the pay telephonestation is installed. The telephone station includes a transmitter 9, areceiver I3, and a dial selecting device I I, all of which apparatus ispreferably mounted upon the cover 6 of the housing I so as to permit allof this apparatus to swing out of the way when the door or cover 6 isopened. A coin return slot or opening I2 is provided through the frontcover 6 for the purpose of permitting a person using the telephone toremove coins which are refunded by reason of failure to obtain theservice for which coins may be deposited.

It will be observed that the receiver I0 is normally supported upon areceiver hook I3 which, like the transmitter dial selector, etc., ismounted for pivotal movement upon the front cover 6 of the housing I.

By referring particularly to Figs. 2 and 3, it will be observed that acoin collecting and refunding mechanism is provided upon the interior ofthe housing I, such mechanism including a coin guide I4 terminating atits upper end in a coin gauge I5 constituting a plurality of circularentrance openings I6, I1, and I8, each of which is designed toaccurately fit the particular denomination coin to be inserted therein.

For example, the circular opening I6 is preferably of such diameter aswill just admit a minimum denomination coin, such as a nickel, while theopening I I fits a larger denomination coin, such as a dime, and theopening I8 fits a still larger denomination coin, such as a quarter. Thecoin guide I4 is provided with a slot leading from each of the circularopenings I6, I1, and I8, these slots being designated by the referencecharacters I9 (associated with the nickel gauge I6), slot 29,(associated with the dime gauge II) and a slot 2| (associated with thequarter gauge I8). The coin guide I4 terminates at a point 22immediately above a transfer basket 23 mounted upon transverse trunnions24 and 25 so as to have a slight forward and rearward motion above itspivot. The basket 23 is illustrated as being provided with a pluralityof slots 26, 21, and 28, the upper ends of which are aligned,respectively, with the lower end of the nickel slot I 9, the dime slot20 and the quarter slot 2| in the coin guide I4 so that any coins whichare deposited in the coin gauges I6, I! and I8 will pass downwardlythrough the coin guide and into the respective slots of the basket 23.

Immediately below the transfer basket 23, we have illustrated aninitial-call coin slot 29 which, as is more clearly illustrated in Fig.4, extends entirely across the rear of the coin guide I4 and has asingle slot 39 therein coextensive with all of the slots 26, 21, and 28and therefore is adapted to receive coins from any one of these slots inthe basket 23.

The initial call coin slot 29 is illustrated as extending downwardly andlaterally with respect to the coin guide I4 to lead any coins depositedtherein to the right-hand side of the housing I to a verticallyextending coin chute 32 which terminates at 33 immediately above a slot34 formed in a forwardly extending partition 35, which slot is in turnaligned with a similar slot 36 constituting an entrancepassage into acoin receptacle or box 3'! secured to the interior of the housing I inany suitable manner.

Immediately to the rear of the initial-call coin slot 29 we haveillustrated a spurious coin chute 38 which, like the coin slot 29, hasan opening 39 therethrough coextensive with the slots I9, 20, and 2!and. is adapted to receive any light weight coin which may be depositedin these slots as by cutting away a portion of the coin guide I4immediately to the rear of these slots, as is indicated in Fig. 4 at 49and securing a relatively thin spring structure 4I to the forward sideof the slots (I9, 20 or 2|), capable of exerting sufficient force toovercome the weight of a coin of any lesser weight than the proper coinfor which the slot is adapted. For example, the spring structure 4|,associated with the quarter slot 2I, should be designed to be readilyflexed by a coin having the weight of a substantially thin quarter, butshould not be flexed by any coin or other article which is deposited inthe slot having a lighter weight. Thus any coin of lighter weight wouldbe directed by the spring to the rear of the basket 23 and thence intothe opening 39 in the spurious or light weight coin slot 38.

By referring particularly to Fig. 4, it will be observed that the slot39 extends downwardly and laterally of the housing I to terminate in anopening 42 immediately above a refund chute 43 which constitutes aslideway extending forwardly of the housing I into a positionimmediately above a refund box 44 secured to and forming a part of thefront cover 6 of the telephone station. Thus light weight coins will besegregated from the coin collection devices and be immediately returnedto the user without entering the coin collection mechanism and therebypreventing the eifective operation of the telephone station by suchlight weight coins.

Since our telephone station is designed to be employed for either localcalls or long distance calls, it is essential that the coin collectionmechanism shall be adapted to receive deposits of toll forlong distancecoins, and for this reason we have illustrated the usual coin maze 45ordinarily employed in pay telephone stations, such coin maze being wellknown in the art as comprising a nickel coin chute 46, a dime coin chute41, and a quarter coin chute 48 each of which chutes extends,respectively, from immediately below the slot in the coin guideassociated with the respective denomination coin. That is, the nickelchute 46 is disposed immediately below the nickel slot I9, the dimechute 4'! is disposed immediately below the dime chute 20 and thequarter chute 48 is disposed immediately below the quarter slot 2|.

However, by referring to Fig. 3, it will be observed that the upper endsof each of the chutes it, ll and 48 is disposed slightly to the front ofthe transfer basket 23 so that coins which are deposited in the chutesI9, 20, and 2| cannot enter the coin maze 45 unless the transfer basket23 is in its forward position instead of the rearward position, as isillustrated in Fig. 3.

By referring particularly to Figs. 2 and 8, it will be observed that theright-hand end of the transfer basket 23 is provided with a transversedepression 59 therein for the purpose of engaging a pin 59 which isslidably mounted in the vertical strut 5i forming one side of a suitablesupporting frame 52, by which all of the coin collection andrefundingdevices are mounted within the housing I.

By referring particularly to Fig. 8, it will be observed that the normalposition of the pin 50 is such as to engage the forward side of thedepression ii! and thus hold the basket 23 in the rearward position,such as is illustrated in Fig. 3, but may be withdrawn to permit thebasket 23 to descend by gravity to its forward position with its slotsaligned with the long distance coin collection maze 35. Thus it will beobserved that the normal position of the transfer basket 23 is such asto direct all proper denomination coins deposited in any of the slotsI9, 29, and 2! into the initial coin call chute, while the transferbasket may be actuated as hereinafter described to its forward positionto permit any, coins which are deposited in the slots I9, 29, and 2| topass into such long distance collection maze.

Referring again to Fig. 3, it will be observed that a still further coinchute, 53 is provided mounted in front of the coin guide M. This coinchute is adapted to refund undersized coins or spurious coins which maybe deposited in the slots 59, 2! and 2!.

By referring to Fig. 4, it will be observed that the front wall of eachof the chutes I9, 20, and 2! is provided with an arcuate opening 54which extends through a considerable portion of the width of the slotwith which it is associated. However, the lower portion of the opening 55 extends but slightly beyond the center line of the slot and aprojection 55 is left extending transversely of the slot so as to engagebeyond the center of any proper denomination coin and guide the samepast the opening 54. However, an undersized coin, that is, one ofsmaller denomination than the correct coin for the slot, will, by reasonof the twist 53 placed in the slot l9, be directed to the opposite sideof the slot from which the projection 55 extends, and thus theprojection 55 will not engage such coin beyond its center point and thecoin will fall out of the slot I 9. In like manner, slugs or tokenshaving a central opening therethrough will not be supported by theprojection 55 but will fall outwardly from the opening 59 and thus passinto the spurious coin chute 53.

The coin chute 53 terminatesat 51 immediately above the refund box orreceptacle 44, so that spurious coins which are undersized will bereturned immediately to the user without entering the coin collectiondevices and thus prevent effective operation of the telephone station bysuch spurious coins.

Referring again to Figs. 2, 3, and 4, it will be observed that theinitial-call coin slot has an opening 58 extending through both thefront and rear walls of the slot into which projects one end of a rod orwire 59 constituting one arm of a lever 60 pivoted to the strut 5| ofthe frame 52, as is indicated at 6|. The lever 69 extends beyond thepivot and is bifurcated at 62 to engage a head $3 formed upon the pin50, so that a coin passing through the call-coin slot 32 will engage therod or wire 59 and move the pin 50 outwardly with respect to the basket23, thus releasing the basket to permit it to move to its forwardposition. This operation insures that the initial-call coin which isdeposited will pass into the initial-call coin chute or slot, whilefurther coins which may be deposited will be directed into the longdistance collection maze 45. The pin. 50 may be biased inwardly by aspring 50a adjustable by means of a set screw 50b secured to a bracket59c mounted upon the frame 52.

It willbe observed that a switch 6 5 is mounted upon the rear of thecoin guide I4 in such position that the switch arms or contacts 65 and55a of this switch are normally held in contacting po sition by theengagement of the rear'surface of the basket 23 with the switch 64 whenthe basket is in its rearward position. This position of the basket willalso hold contacts 65a and 65b in contacting position while contacts 550and 65d will be held in open circuit position ready to close when thebasket 23 moves forward. The function of the contacts will be furtherdescribed hereinafter.

the pay station until a coin has been deposited to secure the opening ofthe switch 64. After a coin has passed the rod or wire 59 it continuesto descend through the initial-coin collection chute 30 to come to restupon a coin holder 6?. which comprises a substantially shelf-like plateof metal extending transversely through a slot 558 penetrating both thefront and rear Walls of the chute or slot 39. Thus the initiallydeposited coin prepares the station for calling another station, thelong distance operator, or any other local call condition.

By referring particularly to Fig. 3, it will be observed that theinitial-call coin chute 33 is provided with an opening 69 in its sidewall to permit egress of coins from above the shelf-like coin holder 61and permit them to pass to the refund chute 43 and thence to the refundreceptacle 34. The slot or opening 69 is normally bifurcated by means ofa pin '10 constituting the end of a rod or bar H which is rotatablymounted at its upper end 12 to a bar 13 pivotally mounted in a suitablebearing, such as a tube 14, for rotation about a horizontal axis at therear of the collection mechanism. The rod TI is connected for movementwith the bar 173 by means of. a dog 7 la. The opposite end 15 of the bar'53 is illustrated as being bent downwardly into a position to engagethe inner end of a rod 16, (see Fig. 5), which is mounted for horizontalreciprocation in a bearing 11 attached to the strut 18 forming thelefthand side of the frame 52.

It will be observed that the forward end of the rod 16 terminates in abutton 19 adapted to be engaged by a lever 80 pivotally secured to thefront cover 6 of the station and arranged to be actuated by the innerend 8| of the receiver hook I 3. Thus, whenever the receiver i9 is onits hook l3, the lever 80 will be pressed inwardly to press the rod 16rearwardly and cause the bar 73 to be moved to its rearward position,thus removing the pin 19 from its obstructing position in front of therefund opening 69 of the initial call coin chute. However, whenever thereceiver is lifted from its hook [3, as is the ordinary procedure when aperson is attempting to make a call from the station, the lever 89 willbe permitted to move forwardly which will result in the movement of thebar 13 to its forward position and cause the exertion of the pin it intoobstructing position in front of the refund opening. Thus the initiallydeposited coin will be held in abeyance by the combined efforts of thecoin holder and the pin H! until the call is completed, or the receiveris returned to the hook upon failure to complete the call. It will beapparent that upon the return of the receiver to the hook, the coinwhich has been held in the chute 30 will now be permitted to passthrough the refund opening 65 and thence to the refund receptacle 44,thus insuring the return of a deposited coin whenever the call cannot becompleted for any reason, such as failure of the calling station torespond or the calling station being busy.

It will be observed that the initial coin which is required to obtainthe initial call connections, need not necessarily be the minimum localcall denomination call coin or nickel, but the station may beeffectively operated to obtain a local connection by means of thedeposit of any one of the three denomination coins for which the stationis adapted. This is particularly desirable in connection with callinglong distance operators, since it is not necessary that the exactminimum charge shall be deposited, but any of the three coins, nickel,dime or quarter, may be employed to obtain the initial connection withthe long distance operator.

In order to obtain the proper collection of. the coin, in the event thatthe call is completed, mechanism is provided for withdrawing theshelf-like coin holder 6'! to permit the coin to pass downwardly beyondthe coin holder and thus pass through the terminal 33 of the chute 35and into the collection receptacle 31. This mechanism comprises mountingthe shelf-like coin holder 61 upon a lever 82, the lower end of which isprovided with a bearing 83 pivotally secured to a bracket 84 as by meansof inserting one end 85 of a suitable opening in one leg of the bracketand passing a trunnion pin 36 through the other leg of the bracket andinto a suitable opening (not shown) in the bearing 83. Thus the lever 32may be rotated about its pivot to draw the shelf-like coin holder 61 outof obstructing position in the chute 30.

Preferably the coin holder 6'! is pivotally secured to the lever 82 asby means of providing a pair of outwardly extending ears 8'! upon thecoin holder 61 and securing the coin holder to the lever by means of atransverse pin 88 passing through the ears and the lever. If desired, anadjusting screw 89 may be provided upon the upper end of the lever 82 tolimit the rearward movement of the lever and thus limit the inwardmovement of the coin holder 61.

The lever 82 is arranged to be moved above its pivot by means of a rod98 secured to and operated by the armature 9| of a relay 92.

By referring particularly to Fig. '7, it will be observed that the relay92 constitutes an elongated coil of relatively small diameter secured inany suitable manner within the frame 52 and preferably having itslongitudinal axis extending transversely across the front of the frame52. The armature 95 is illustrated as being pivoted at 93 so thatenergization of the coil of the relay 92 will draw the armature 9|toward the coil while at the same time the lever 90 will be movedoutwardly. The end of the rod 99 is illustrated as being connected bymeans of a link 94 to a forwardly extending car 95 formed upon the lever82 so that outward movement of the rod 95 will cause a forward movementof the lever 82 and thus withdraw the coin holder 51. If desired, aspring 96 may be provided around the bearing 83 to normally bias thelever 3! to its rearward or inner position to thus insure that the coinholder 57 will normally be in position to engage coins passing throughthe slot 30.

As hereinafter described, the relay 92 is arranged to' be operated asthe result of the transmission of reverse current over the line to whichour pay telephone may be connected when the called station responds tothe call. Thus whenever a call is completed, the relay 92 is operated towithdraw the coin holder El and insure collection of the coin. Moreover,the time at which it will be collected is at the instant the calledstation responds, so that there will be no opportunity for a person toconverse over our pay station and then recollect the coin at the end ofthe call.

The remainder of the apparatus disclosed will best be understood withreference to a series of assumed operation of our pay telephone station:

Assuming that a person desires to make a local telephone call from ourstation, such person may lift the telephone receiver l from its hook l3.However, at this time the talking or dialing apparatus of the telephoneis preferably out of operative condition to prevent effective calling ortalking over the telephone until a coin has been deposited. This may beaccomplished by interconnecting circuits of the telephone pay station,as is indicated in Fig. 11, wherein a pair of line conductors linel andline2 are represented as being the two line conductors extending fromthe central station to which the telephone may be connected.

A ground connection is also provided for the pay telephone station, asby way of conductor N30, to a ground indicated at IM. A hook switch N32is illustrated as being of the usual type employed in connection withtelephone stations to be actuated from a normal position, such as thatillustrated in Fig. 11, when the receiver is on the hook, to itsopposite position when the receiver is removed therefrom. A dial switchI93 is illustrated as being operated by the dial selecting mechanism H.

A reverse current relay Hi l is provided as comprising the usual type ofreverse current relay which will be operated only by current flowing inone direction, thus permitting effective operation of this relay onlywhen an incoming call connection is made, or when a called stationresponds to the call. Under the assumed combination, the receiver hadbeen lifted from the hook and thus moved the switch :2 from the positionillustrated in Fig. 11, thus establishing a circuit extending fromline-l through conductor )5, the contacts of the reverse current relayEM, conductor tel, the coil of reverse current relay lll l to theconductor use, the contacts H39 of the dial switch me, (which at thistime will be closed since the dial has i not as yet been operated),thence through the conductor HE, transmitter 9, conductor Ill, theprimary coil P of a transformer H2, conductor M3, the contacts H t ofthe hook switch H32 (now closed), and then by Way of conductor I I toline-2.

By reason of this connection, the normal dial tone will be emanated fromthe receiver I0, indieating that the telephone is condition foroperation. However, it will be observed that a shunt circuit is providedwhich shunts out the transmitter T and the dial switches I93, preventingeffective operation of the dial and preventing effective talking overthe line until the shunt circuit is opened This shunt circuit isillustrated as extending from lineI by way of conductor I95 to a.junction point I I 6 and thence by way of conductor I ll to the normallyclosed contacts I I8 of a switch II9 controlled by the relay 92 employed for collection of coins in the initial call coin chute. Thencethe shunt circuit extends by way of conductor I29 to the normally closedcontacts b and 65 of the basket switch 94, which is arranged to benormally held in closed position whenever the basket 23 is in itsrearward position ready to direct coins into the initial call coincollection chute 39. Thence the circuit extends by way of conductor I2Ito a junction point I22 on conductor I l I. Thus current is effectivelyprevented from passing through the reverse current relay I94, the dialswitch I93 and the transmitter 9 until a coin is deposited.

Assuming that the person desiring to make the local call now deposits acoin in one of the coin gauges I6, I! or I8, such coin will pass downthrough the coin slot I9, 29 or 2 I, respectively, and thence into theinitial-coin collection chute 29, passing downwardly therein until suchcoin engages the rod or wire 59 and moves the same laterally in the slot32 to withdraw the pin 59 and permit the basket 23 to move to itsforward position. Movement of the basket 23 opens the contacts 65 and bof switch 64, thus removing the shunt which has been holding the dialand transmitter circuits out of effective operation. Hence as soon as acoin is deposited the telephone station may effectively be operated toselect the particular called station to which the party desires to talk.

However, during the operation of the dialing mechanism the coin whichhas been deposited will be held in abeyance upon the coin holder 61 andsince the receiver is off its hook, the pin I9 will be in positionacross the refund opening of the initial-call coin chute 39 and thus thecoin will not be permitted to pass either to the collection receptacle3! or to the refund receptacle 44.

Assuming that the called station fails to respond for any reason, theperson using the telephone may hang up the receiver. In doing so thereceiver hook I3 will be operated to move the bar I3 to its rearwardposition, thus removing the pin I9 from the refund opening of theinitial-call coin chute and permitting the coin, which has been held inabeyance, to pass out to the refund receptacle 44 where it may beretrieved by the party making the initial call.

By referring particularly to Fig. 5, it will be observed that the rodI6, which is operated by the receiver hook to move the bar or rod 13 toits rearward position, also carries an upwardly and rearwardly extendingpin I23 which engages in a slot I24 in the forward side of the basket 23so that whenever the receiver is returned to the hook I3, the basketwill be mechanically moved to its normal rearward position, such as isillustrated in Figures 5 and 3, reclosing the contacts 65 and 66 of thebasket switch 65b, thus conditioning the telephone for a subsequentoperation by any other person who desires to make a call. Thus, it willbe observed that the only way in which a coin can be refunded to thecalling party is by operating the receiver hook I3 and the consequenceof this operation is to restore the telephone circuits to normalcondition, requiring a new deposit of a coin in order to permit furthercalls to be made. I

However, assuming that the called station does respond, such responsewill be accompanied by the transmission of reverse current over the lineline-'I, line2. That is, the current which passes over the line will bein the reverse direction from that which has been previously flowing theline, as is the usual practicein pay telephone station practice at thepresent time. Such reverse current will cause actuation of the reversecurrent relay I94 since the circuit for this relay is now effectively apart of the circuitbetween line-I and line-2.

Tracing this circuit, the reverse current will flow through lineconductor line2 by way of conductor II5, the now closed contacts II4 ofthe hook switch I92, conductor II3, the primary P of transformer H2,conductor III of transmitter 9, dial switch contacts I99 (now closedsince dialing has been completed), conductor I98, relay I94, conductorI91, contacts of reverse current relay I99, and conductor I95 to lineconductor lineI. It will be remembered that at this time the basketswitch 64 will be in open circuit condition, and thus the shunt acrossthe circuit just described will be open.

Referring particularly'to Fig. 11, it will be observed that the coil 92is normally connected in shunt circuit relation with the contacts I96 ofreverse current relay I94; that is, the circuit for the relay 92 extendsfrom conductor I95 by way of conductor I25 to coil 92, conductor I29,con- .tacts I2'I of hook switch I92, (now closed since the receiver isoff the hook), conductor I28 to junction point I29 on conductor I91, andthence by way of conductor I91, contacts I99 of reverse current relayI94 and conductor I95 to line conductor lineI. Thus until contacts I99of the reverse current relay I94 are opened, no current can flow throughthe coil 92. However, as soon as reverse current flows over the line andreverse current relay I94 is thus operated to open its contacts I96,current will be supplied to the coil of relay 92 to cause this relay toactuate its armature 9I.

. The effect of the operation of the armature 9| is to move .the rod 99forwardly to thus draw the lever 82 forwardly, removing the coin holder61 from its obstructing position in the initial-call collection chute 32and thus permit the coin which has been held upon the shelf or holder topass downwardly through the openings 34 and 36 into the coin collectionreceptacle 31.

v Thus it will be observed that as soon as the called station responds,the coin required for such call is collected immediately.

It will also be observed that the actuation of the lever 82 to withdrawthe coin holder 97 will, by reason of the pivotal connection of the coinholder with the lever, draw the coin holder directly through a straightpath, thus the only resistance to the withdrawalof the coin holder isthat friction which is created by the weight of the coin bearing thecoin holder 6! against the bottom of the slot in which it operates.Moreover, by reason of the pivotal connection of the coin holder 6! anyrebound or jarring which may occur as a result of the coin dropping uponthe holder, will be absorbed by the coin holder and will not be directlytransmitted to the lever 82, thus effectively preventing a false returnof the lever 82 to collect the coin until the lever 82 is actuated bythe operation of relay 92.

Again referring to Fig. 11, it will be observed that as soon as the coil92 operates to move its armature 9! an extension I39 on the armaturewill engage the switch H9 mounted upon the frame 52 (see Fig. 2), tocause the opening of contacts H8 and the closing of contacts I3I of thisswitch. The closing of contacts I3I will complete a shunt circuit aroundthe coil 92 to remove the resistance of this coil from the talking andlistening circuits, thereby increasing the amount of current which ispermitted to flow in the talking and listening circuits. This shuntcircuit is illustrated as extending from line conductor lineI by way ofconductor I05 to junction point H6 and thence by way of conductor 1,contacts I3I of switch II9, conductor I32, junction point I321) whichconstitutes the other terminal of coil 92 and thus provides a metallicpath of low resistance around the coil 92. However, it will be notedthat a circuit has now been established for the reverse current relayI04 which is independent of contact I06 of this relay, this circuitextending from line-1 through conductor I I1 and through the contactsI3I of switch I I9, the contacts 050 and 95d of the basket switch tojunction point I321) and thence by way of conductor I29, contacts I21 ofhook switch I02, and conductor I28 to the coil of relay I04, conductorI08 and thence through the dial and transmitter and primary transformerH2 and contacts II4 of hook switch I02 and conductor II5 to lineconductor line2. However, as soon as the call is completed and thecalling party restores the receiver I0 to its hook I3, the operation ofthe hook switch I02 will open the talking and listening circuits, whileat the same time the basket 23 will be moved back to its normal rearwardposition reclosing the basket switch 94 and thus restoring the circuitsto normal and ready for another call.

Next assuming that the party desiring to use the telephone wishes tomake a long distance call, the receiver II] will be lifted from the hookI3, as hereinbefore described, but again it will be necessary for theperson to deposit a coin be fore connection can be had with the longdistance operator. The deposit of the initial-call coin in any of theslots I9, 20 or 2I, will be followed by the operation of the rod 59 torelease the basket 23, as hereinbefore described, while the initiallydeposited coin will pass into the coin chute 30 to be held in abeyancetherein by the coin holder 67 and the pin I0 in exactly the same manneras previously described for making a local call. However, it will beobserved that since the basket 23 is released from its rearward positionit is now in its forward position aligned with the long distancecollection maze 45.

The long distance operator, upon responding, will receive the number ofthe called station and has a choice of either of two operations; namely,first, she may request the calling party to hang up the receiver andwait until she rings, or, second, she may request him to hold the lineuntil the connection with the called station has been obtained. Assumingthat she requires the calling party to restore the receiver to the hook,the pin III will be withdrawn, as hereinbefore described, and theinitial-call coin will be refunded in exactly the same manner ashereinbefore set forth.

Assuming that the long distance operator obtains the connection with thecalled station, she may then ring out pay telephone station by sendingringing current over line-I and ground, as is the usual practice incentral station telephone operation. The ringing circuit extends fromline conductor lineI through conductor I05, reverse current relay switchI09, conductor I91 to junction I29, and thence by way of conductor I28to junction I33, thence by way of conductor I34 to the bell coilsindicated by the legend Bell, conductor I35 to junction I30, thence byway of conductor I31, normally closed contacts I38 of hook switch I02,(now closed since the receiver is on the hook), and thence by way ofconductor I39, ringing condenser I40 and conductor I00 to ground at I9I.

Since the long distance operator is calling our pay telephone station,it is necessary that the telephone station should be placed in conditionfor talking without the necessity of a re-deposit of a coin in theinitial-call coin collection chute, and for this reason we have providedan auxiliary circuit parallel with the bell circuit to cause theoperation of the relay 92. This parallel circuit extends from lineconductor line-i through conductor I95,conductor I25, coil 92, conductorI26 to junction I36 and thence to ground by way of conductor I31, as waspreviously described for the bell circuit. Hence coil 92 will receive aportion of the ringing current and will actuate its armature 9|.

By referring particularly to Figs. 2 and 5., it will be observed thatthe extension I30 on the armature 9! extends beyond the switch II9 to aposition immediately below a lever MI. The lower face of the lever MI isprovided with a stepped recess comprising a normal lower level I42, anintermediate level I43, and an uppermost level I44. The lever MI isillustrated as being pivoted at I to the strut I8 01" the frame 52 so asto permit the lever to have a vertical movement. The lever MI is alsoillustrated as having a cam I40 pivoted thereto at I 41 to engage a rodor wire I48 rigidly secured to a shaft I49 which is in turn pivoted in abracket I secured to a strut I8. A second rod I5I, also rigidlyconnected to the shaft I49, extends upwardly to a position immediatelyin the rear of the downturned end 15 of the rod or bar I3. Hencewhenever the telephone receiver is on its hook the lever 80 will pressthe rod or bar 13 to its rearward position and by reason of theengagement of the rod I5I therewith, the rod I48 will be pressedoutwardly to a position limiting the inward movement of the extensionI39 on the armature 9|.

It will be observed, however, that the limit of movement of theextension I39 is such as to permit the extension to move inwardly pastthe lower level I42 to the intermediate level I43 of the lever I4I. Thusenergization of the relay 92 will cause the extension I39 to be movedinwardly to a first position, where it engages in the notch formedbetween the levels I42 and I43 on the lever I4I.

From an inspection of Fig. 5, it will be observed that this amount ofmovement which is permitted the extension I39, will be sufficient tomove the contacts of the switch I I9 to such position as will open thecontacts IIB, but will not be suificient to close the contacts I3I.

It will be remembered that in the tracing of the normal circuits of thetelephone station, the circuit which prevented effective operation ofthe talking or dialing mechanisms included contacts II8 of the switch[I9 so that the disabling of the talking and selecting circuits isremoved from either of the following two operations; first, the depositof a coin which moves the basket 23 and opens the basket switch 6 5; or,second, the operation of the relay 92 which opens the contacts I I8 ofswitch H9. Hence the initial ringing of the telephone prepares thetalking circuits so that the telephone is conditioned for talking by theactuation of the ringing device of our telephone station.

When the person desiring the long distance call responds to the ring bylifting the receiver from its hook, the rod I48 will be permitted toswing rearwardly to no longer obstruct the movement of the extensionI30, and since the long distance operator is calling our station, shemay place reverse current upon the line to operate the reverse currentrelay HM to cause further energization of the coil 92 in the mannerdescribed with refer ence to the response of any called station.

Thus the relay 92 will be actuated to operate its armature 91 and theextension 13E thereof will further operate the switch I19 to closecontacts I31, thereby effectively removing the resistance of the coil 92over the talking circuit and permitting conversation over the telephoneunobstructed by such additional resistance upon the line.

Since the connection is ready for the long distance call, it is nownecessary that the long distance operator should inform the callingparty as to the amount of toll which must be deposited and the coincollection apparatus must be arranged so as to permit the depositedcoins to pass directly into the long distance coin maze t5. This isaccomplished by means of an interconnection between the actuation of therelay 92 and the operation of the basket releasing pin 59.

By referring particularly to Figs. 2 and 3, it will be observed that anyactuation of the relay 92 will be accompanied by an outward movement ofthe rod 99 attached to the armature iii of the relay. This operationwill cause outward movement of the lever 82 to withdraw the coin holder51, as was previously described herein with refer ence to a local call.However, it will be observed that the lever 82 is provided upon itslower end withan extension arm E53 which will be moved downwardly as thelever 82 is moved outwardly under the influence of the rod 99. Theextension 53 is connected by means of a rod or wire IS E to anoutstanding lever l55 connected to the lever 69. This connection iseffected by means of forming a relatively elongated slot M5 in theextension I53 to engage the hooked end of the wire 154, while a similarelongated slot IE1 is provided in the lever arm 155 to engage a hookedend formed upon the opposite end of the wire I5 3. Thus whenever therelay 92 is actuated, as in the case of the long distance operatorcalling our pay station, the responsive movement of the rod es willcause a downward movement of the arm 155 on the lever 69 and thus willcause the lever cc to be operated in the same manner as though a coinhad been deposited in the initialcall coin slot and operated the rod orwire 59.

However, it will be observed that by reason of the elongated slot andhook connection between the wire E54 and the extension I53 and arm I55,the operation of the lever 69 will not cause movement of the lever 32,and thus though the lever 6!! may be moved under the influence of thelever 69 on the initial coin chute, it will not cause the lever 82 toremove the coin holder. Thus there is provided two distinct methods ofmoving the transfer basket 23, namely by the deposit of the coin, and bythe actuation of relay 92 by an incoming call. Likewise, there are twodistinct functions of the relay 92, namely, that of causing collectionof coins for an outgoing call, and that of operating the transfer basketin response to an incoming call.

' The operation of the lever 69 will withdraw the pin 58 from itsholding position with reference to the basket 23, and the basket willtherefore be moved to its forward position ready to direct coins intothe coin maze 45. Hence the calling party may now deposit the requirednickels, dimes or quarters necessary to make up the total toll chargefor the particular call which he is making.

It will be understood by those skilled in the art that the deposit ofthe coins in the nickel slot will cause them to pass through the nickelslot t6 and thence to be directed against a suitable audible signal I58,and coins deposited in the dime slot will pass through the dime slot 11to be directed against the audible signal I58 twice during its passagethrough the maze; while quarters deposited will pass down through thequarter slot 8. to be directed against a different tone audible signalI59. All of the coins, after they have actuated the audible signals,will be directed to the lower end I69 of the coin maze and thence passthrough an opening IBI in the partition and through a suitable openingI62 in the coin collection receptacle 31.

As was described and claimed in our copending applications, Serial No.554,190, filed July 31, 1931, and Serial No. 578,060, filed November 30,1931, the coin receptacle 31 may be divided into two compartments bymeans of a partition I63 so as to segregate the local collections whichpass through the openings 34 and 36 from the toll or long distancecollections which pass through the openings ltl and I62.

On the other hand, assuming that the long distance operator, uponreceiving the number of the station desired by the calling party,requests the calling party to hold the line, the obtaining oi the longdistance call will be made in the usual manner and prior to connectionwith the called station, the long distance operator may request thedeposit of the necessary toll charges. Under these conditions, it willbe observed that the basket 23 will have been moved to its forwardposition in response to the deposit of the initial-call coin so that thebasket is in the correct position to direct the toll charges into thetoll long distance collection maze 55. However, the initial coin whichwas deposited to obtain connection with the long distance operator willbe held in abeyance in the initial coin collection chute until the endof the call. At this time the calling party will hang up the receiver,thereby removing the pin I0 from the refund opening in the coin chute,and permit the initially deposited coin to be refunded to the personusing the telephone.

It will be observed that when such connection is made, the long distanceoperator does not send reverse current over the line to our telephonepay station, and hence the relay 92 is not operated, and therefore therewill be no removal of the coin holder 61 during the entire time the longdistance call is taking place.

Assuming now that some other station desires to call our pay telephonestation, this is accomplished in the usual manner by the actuation ofthe central station selectors to make connection with our pay telephonestation. As was described with reference to the calling back by the longdistance operator, the ringing circuit being established to our paytelephone station will cause actuationof the ringer or bell of ourstation and by reason of the shunt circuit to the relay 92 this relaywill be actuated to move the extension I30 to the first notch of leverI, thus preparing the telephone for the response to the call. When thereceiver I ii is lifted from the hook I3, in response to such ring, thecurrent from the calling station will be reversed current operatingreverse current relay Hi l and further operating relay 92 to remove theresistance of relay 92 from the talking circuit and permit unobstructedresponse to the calling station without necessitating the deposit of acoin in our station.

The purpose of providing the double notch in lever MI to cause theoperation of the switch II9 to follow two distinct and consecutivesteps, is to insure that an incoming call will be effective to connectour telephone station for talking to the calling party, while the mereresponse of a station which is called from our pay station will not beeffective to condition the circuit for talking.

Thus while our station is effectively operated for talking for anincoming call, it will be impossible for a calling party at our stationto obtain connection with the called station and yet obtain a refund ofthe coin which he deposited for such call. This purpose is more readilyapparent from a study of the two conditions.

Upon attempting to make an outgoing call, the party at our station willlift the receiver from the hook and deposit his coin, thus opening theshunt around the talking and dialing circuits, permitting him to operatethe selectors necessary to ring the called station. By merely holdingthe receiver off the hook, the circuits which have been established bythe deposit of the coin will remain efiective when the reverse currentcomes over the line in respon e to the answering by the called station,and in addition the reverse current will cause the collection of thecoin. However, should the calling party at our station attempt to obtaina refund of his coin after the ringing connection is made with thecalled station and before the answering by that station, our stationwill become immediately disabled for talking, even though the calledstation answers. In other words, the only way in which the reversecurrent coming in from another station can effectively operate ourtelephone is when the call is accompanied by two distinct operations,namely, first, the ringing of our station, and, second, the supplying ofreverse current to our station from the outside calling station.

This operation will be best understood from an inspection of Fig. 11, inwhich it will be observed that the circuit tothe reverse current relayI04 is normally shunted by the circuit which includes the contacts II8of switch H9, and the contacts 65a and 55b of the basket switch 64. Inother words, this shunt circuit excludes not only the transmitter andthe dial circuits from eifective connection with the line line-I,line-2, but also effectively prevents the operation of the reversecurrent relay, as well. Thus while an incoming call which includes thedouble operation of the ringing of our telephone station and theresponding by our telephone station, will succeed in removing the shuntcircuit from our telephone station, by the initial operation of relay 92by the ringing current, while the receiver is still upon the hook, thuscausing the opening of switch H8, an attempt on the part of a personusing our telephone to obtain a refund of his coin and still talk withthe station he has called, will not be effective.

Assuming that a party at our telephone station has deposited his coinand is dialing the number of the station to which he desires to beconnected, and that connection is successfully established with thecalled station, the deposit of the coin has opened the shunt circuit atthe basket switch 84.

Now assuming that while the called station is ringing, the party at ourstation hangs up the receiver or momentarily operates the receiver hookto cause the removal of the pin Iii, to refund the deposited coin, suchfalse operation is accompanied by two distinct effects, namely, thebasket 23 is pressed back to its original position by means of the rods16 and I 23, while at the same time the accompanying forward movement ofthe rod or wire I48 will cause the end of that wire to ride under thecam I46 and lift the lever I II while at the same time the outwardmovement of the rod I48 will engage the extension I 36 on the armature9| of relay 92 and will press against the extension I30 on the armatureill of the relay 92 and will insure that this armature is in its normalnonoperated condition. This will insure that the switch contacts I I8 ofswitch I I9 are closed so that the rearward movement of the basket 23will close switch 64 and re-establish the shunt circuit, taking thetransmitter, the dial, and the reverse current relay out of effectivecircuit operation. Thus as the called station responds and sends reversecurrent over the line to our pay station, such reverse current is notpermitted to enter the reverse current relay I64 and therefore the relay92 is not operated and the shunt across the talking circuit remainsacross this circuit and efifectively prevents conversation.

In other words, the false operation of our telephone in attempting toobtain both the refund of the coin and connection with the calledstation, is rendered futile and the attempt is defeated.

As hereinbefore described, another station calling our station willrender our station eifective for talking without the necessity ofdepositing the coin in our station. However, the necessity for providingdevices rendering our telephone effective for talking upon thecompletion of connections for the incoming call opens the possibilitythat after our station has been rung, but no one at our station hasresponded, a subsequent user of our telephone could obtain a callwithout depositing a coin for such service. fact that the relay 92 isactuated by the ringing current coming in from another station, opens aportion of the normal shunt circuit around the talking circuits andleaves this shunt circuit open unless the subsequent operation oflifting the receiver at our station is performed. This, it will beobserved, follows from the catching of the extension of the armature 9|in the first notch of lever I4I which will only be released upon thelifting of the receiver and restoration of the receiver to its hook.

However, the possibility of this false operation or this possibility ofobtaining free service is obviated in our system by providing asecondary shunt circuit around the transmitting and listening apparatuswhich can be controlled only by the basket switch.

By referring particularly to Fig. 11, while the normal shunt circuitaround the transmitter, dial and receiver circuits passes in seriesrelation through the contacts N8 of switch II9 and through contacts 65aand b of the basket switch 64, a secondary shunt circuit also extendsaround the transmitter, dial and receiver circuits independent of theswitch contacts H8. This That is, the

circuit may be traced from junction point I22 on the receivertransmitter circuit through conductor l2], contacts 65 and 65d of thebasket switch 64, and through conductor ill! to a junction ill onconductor 468 from the opposite side of the circuit to the transmitterand dial.

Therefore, unless the basket switch is operated, the talking and dialcircuits of our telephone remain inoperative. It therefore follows thatunless the receiver is lifted from our telephone in response to anincoming call, the reverse current necessary to operate the reversecurrent relay and to cause the complete operation of relay 92 to tripthe basket switch, will not occur, and the dial and transmitter circuitswill remain shunted. However, as soon as the receiver is lifted from thehook the reverse current will operate the reverse current relay and willcause a tripping of the basket switch, as hereinbefore described, forthe operation of an incoming call. Hence, though the incoming ringingcurrent is permitted to operate the switch I 58, this operation will notserve to render the station effective unless, and until, the receiver islifted from the hook while the calling station remains connected withour pay telephone station.

While we have described the paths of the initial call coin which isdeposited as passing immediately to the initial'call coin collectionchute to be refunded upon the restoration of the receiver, or to becollected upon the completion of the call, it frequently occurs that aperson using the station deposits the coin prior to the lifting of thereceiver from the hook. While, with the system hereinbefore described,such initial deposit of coin would immediately refund the coin, itfrequently occurs that a person does not observe that the coin has beenrefunded and thereafter, upon lifting the receiver and failing to obtainthe desired connection, reports the telephone as out-of-order. This maybe obviated by the employment of an auxiliary pin 112 forming the end ofa rod H3 which is in turn connected to the link Ha which interconnectsthe receiver actuated rod 13 and the wire I! so that whenever thereceiver is on the hook the pin H2 extends into the initial-call coinslot and holds the prematurely deposited coin in abeyance until thereceiver is lifted. Thereupon, the coin so held, may descend through thechute and operate the devices as was described herein for the normalcalling operation.

To sum up, it will be apparent that we have provided a pay telephonestation in which outgoing calls may be accomplished for either localservice or for long distance service, and in which the deposit of any ofthe denomination coins for which the telephone is adapted may bedeposited to obtain the initial connection or call. That, further, thetelephone station is so arranged that an incoming call can effectivelyoperate the circuits of our telephone to condition our telephone toreceive incoming calls, while at the same time an outgoing call isrendered ineffective by an attempt to obtain the call without theconsequent collection of the necessary charge for the call.

It will be further apparent that the arrangement of the coin-collectingand refunding devices is such that the station cannot be renderedeifectively operative by means of jarring, striking, or otherwisetampering with the station, and, further, that coins will beautomatically collected or refunded depending upon whether or notsuccessful completion of the calls can be obtained.

While we have shown and described the preferred embodiment of ourinvention, we do not desire to be limited to any of the details shown ordescribed herein, except as defined in the appended claims.

We claim:

1. In a pay telephone station for local and long distance service, coincollection and refunding devices including a plurality of coin depositslots each adapted to receive coins of denomination different from thatof the remainder, an initialcall coin chute and a long distance callcoin chute, transfer means interposed between said slots and said chutefor selectively diverting coins into either of said chutes, meansnormally rendering the talking circuits of said station ineifective,means normally operating said transfer means to direct coins to saidinitial-call coin chute, and means in said initial-call coin chuteoperable by the deposit of a coin in any of said slots for renderingsaid talking circuits effective and for moving said transfer means todivert further coins to said long distance coin chute.

2. In a pay telephone station, a coin collection chute having acollection opening and a refund opening, a coin holder comprising alever movable toward and away from said chute, obstructing meansentering said chute, and means pivotally mounting said obstructing meansupon said lever.

3. In a pay telephone station, a coin collection chute having acollection opening and a refund opening, a coin holder comprising alever movable toward and away from said chute, obstructing meansentering said chute and pivotally secured to said lever, and meansoperable by supply of reverse current to said station for actuating saidlever to remove said obstructing means from said chute.

4. In a pay telephone station, a coin collection chute having acollection opening and a refund opening, a coin holder comprising alever movable toward and away from said chute, an obstruction pivotallysecured to said lever and entering said chute, means in said chuteoperable by the passage of a coin therethrough for rendering saidstation effective for operation, means interconnecting said coinactuated means and said lever to operate said coin actuated means bymovement of said lever but to permit actuation of said coin actuatedmeans without moving said lever.

5. In a pay telephone station, coin collection and refunding apparatusincluding a coin guide having a plurality of slots therein each adaptedto receive coins diiferent from that of the remainder, an initial-callcoin chute positioned below said coin guide to receive coins depositedtherein, a light weight coin diverting means in each of said slots fordiverting light weight coins therefrom before entry into saidinitial-call coin chute, and a refund chute positioned adjacent saidcoin guide to receive said diverted coins and to pass them out of saidstation.

6. In a pay telephone station, coin collection and refunding apparatus,including a plurality of diverted coins and to pass them from out of thestation.

7. In a pay telephone station, a coin guide including a plurality ofslots each adapted to receive coins of a denomination difierent from theremainder, an initial-call coin chute positioned below said coin guideto receive coins from said slots, spurious coin diverting meansincluding means for detecting undersized or irregularly shaped coinspositioned in said slots to divert such coins therefrom prior to entryinto said initial-call coin chute, and a refund chute positionedadjacent said coin guide to receive such diverted coins and to pass themout of the station.

8. In a pay telephone station, a coin collection chute, having acollection opening and a refund opening, a coin holder in said chute forarresting a coin passing through said chute prior to its arrival at thecollection opening and refund opening, said coin holder including aplate extending into said coin chute at right angles to the direction ofmovement of coins in said chute, and means for mounting said plate formovement into and out of said chute by a non-pivotal sliding motionwhereby impact of coins on said plate will be prevented from moving saidplate out of said chute.

